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W. D. ARMSTRONG AND W. l. ARMSTRONG, OF HARLEM, ILLINOIS.

Letters Patent No. 63,687, dated, April 9, 1867.

IMPROVEMENT IN GATES.

TO ALL WHOM IT MAY CONCERN Be it known that we, W. D. YARMS'JIRONG and W. I. ARMSTRONG, ot Harlem, in the county of' Winnebago, and State oi' Illinois, have invented ra new and useful Improvement Ain Gates; and'we do hereby declare that the following is a. full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to thenccompanying drawings, forming part of this specification, in which- Figure I is a side view of our improved gate, partly in section, through the line y y, fig. :2.

Figure 2 is a vertical vsection of the same, taken through the line a: iig. 1.

Similar` letters of reference indicate like parts.

Our invention has for its object to improve the construction et" the gate invented by W. I. ARMSTRONG7 patented August 2l, 1866, and .numbered 57,432; and it consists in the combination of an eccentric pulleyor wheel with one of thc central posts, and with the cord or chain of the heavy or balance weight; in pivoting the lower ends of the side levers to the middle posts hy a bolt passing through the endsot' the said levers, and through the said posts; in attaching a spring catch to the forward end ot' the gate, and operating it by the cords or chains by which the gate is raised; in the combination of guards with the sides of the gate and with the side levers; and in the combination otlong pulleys or friction-rollers with the middle posts and with the operating cords or chains,.the whole bci-ng constructed and arranged as hereinafter more fully described.

A is thet'ront gate-post, in the front sideoi which are formed mortises, having bcvelled sides and tops to receive the projecting ends of' the horizontal bars ofthe gate. B are the central posts, thc upper ends of which are connected and held in their proper relative positions bythe cross-bar C, as shown in lig. 2. D are the outer posts, to the upper ends of which are attached arms E, to the ends ot' which are pivoted the pulleys F, as shown in gs. 1 and 2. G is the gate, to the rear upper corner of which are pivotcd the upper ends of' the levers H, the lower ends of which are pivoted to suitable supports set in the ground by a long bolt, I, passing through the said supports and through the lower-.ends of the said levers. This bolt I also forms a rest or support forthe gate when fully open, ns shown in red in fig. 1. J are the side levers, thc upper ends of which are pivoted to `the middle of the upper part of the gate, and the lower ends of which are pivoted to the central posts B by a long bolt, K, passing through the said posts, and through the lower ends of the said levers, as shown in fig. 2.

The holt K also forms'a support for the rear end of the gate when closed, and for its forward end when opened,

as shown in iig. 1. L are guards, attached to the sides of the middle part of the gate, which, by coming'in contact with the side levers J, keep the said gate in proper position while being opened and closed. M are the cords or chains by which the gate is operated. The forward ends of the cords M are attached to the upper edge ofthe gate at its middle part; thence they pass back to the upper part of posts B, where they pass between the long pulleys or friction-rollers N, and over the pulleys O; thence they pass ont to the upper `ends of the posts D, where they pass over the pulleys F, as shown in figs. 1 and 2. P are weights, attached to the free ends of the cords M, and whichshould he of suilcient size to keep the said cords or chains always taut. To the lower ends of the weights P may he attached handles or loops for convenience in operating the gate. R is the heavy or balance weight, which is attached to the end of the cord or chain The cord or chain S passes over the eccentric-pulley or wheel T, between the long pulleys or friction-rollers U, and its other end is attached to the side lever J, as shown in figs. 1 and 2. If desired, the end of thecord or chain S, that is attached to the lever J, may be replaced by a rod or bar, as being less liableto get foul in operating the gate. The cord or chain S should bc so attached to the lever J that opening the gute halfway will revolve the pulley T half around; and,

when the gate is shut, the pulley T should stand with its shortest radius towards the gate. To' keep the pulley T from getting out of this relative position as itmoves back and forth in operati-21g the gate the cord or chain S may be fastened to its face by a staple7 or in some other convenient manner. By this construction and arrangement of the eeccntric-pulley T and cord or chain S the gate will be more nearly balanced in all positions hy the weight R, the weight acting upon the longest radius ot' the pulley, and the gate upon the shortest one, at the time that the gate bears down upon the chain or cord S with the greatest force. Hence, it is obvious that, by the use of the eccentric-pulley, as above described, the gate can be opened and shut by a much less power. V is a spring catch attached to the gate Gr to fasten it shut, and which is connected to the cords or chains M by a rod, W, so that, upon pulling upon either of the said cords or chains to open thcgate, the tirst ellect is to draw hack the spring catch V, and unt'asten the gate.

What we claim as new, and desire to secure-by Letters Patent, is-

1. The combination of the eccentric-pulley or wheel 'l with one of the central posts B, anti with the cord or c'hoin S of the heavy or balance weight E, substantially as herein-shown nntl described, unil for the purpose set forth.

2. Pivoting the lower ends of the side levers J to the conti-ul posts B by o, long bolt, Kfsubstuntielly hs herein shown and described, and for the purpose set forth. l v

3. Attaching a. spring eoteh V to the forward end of the gate, and operating it byfthe cords or chains M by which the gute is operated, substantially :is herein shown und described.

4. The combing-tion et' the guards with the sides of the gate G, enil with the siilo levers ll,substantially es herein shown and described, and for the purpose set forth. i

5.. The combination of the 'long pulleys or friction-rollers N und U with the central posts B, and with the cords or chains M und S, substantially as herein shown anti-described, unil for the purpose set forth.

W. D. ARMsT'RoNG, W. l. ARMSTRONG.

Witnesses Amos WARD, THOMAS J. RUDD. 

